Unnamed Prospect (ARDF - NB107; in south tributary to Fourmile Creek), Chisana Mining District, Southeast Fairbanks Census Area, Alaska, USAi

Regional Level Types
Unnamed Prospect (ARDF - NB107; in south tributary to Fourmile Creek)	- not defined -
Chisana Mining District	Mining District
Southeast Fairbanks Census Area	Census Area
Alaska	State
USA	Country

The prospect is in the Wrangell-St. Elias National Preserve.
Location: This prospect is in the headwaters of an unnamed south tributary to Fourmile Creek. It is at an elevation of about 5,100 feet, 2,000 feet south-southeast of peak 5574, and 2,500 feet west of elevation 5202. The site is in the SE1/4 of section 24, T. 4 N., R. 23 E. of the Copper River Meridian. This is National Park Service locality WRST-82 (unpublished data) and the coordinates of this prospect were provided by the National Park Service.
Geology: An unpublished National Park Service map and accompanying database identify this as a gold, silver, copper, and lead prospect. It apparently is the prospect reported by Moffit and Knopf (1909) as being near the head of Fourmile Creek. Several quartz veins up to 30 feet thick contain sparse chalcopyrite. Some masses of the quartz form silicified and brecciated zones that enclose large angular blocks of country rock. The country rock includes shale and argillite intruded by a porphyry (Moffit and Knopf, 1909). This description seems to match the description of the Susan prospect (NB106) better than it does this prospect. The ridge above Baultoff Creek near this prospect is mantled by Quaternary surficial deposits that overlie upper Paleozoic volcanic rocks (Richter and others, 1973).
Workings: At least some prospecting here.
Alteration: Silicification.

Commodities (Major) - Ag, Au, Cu, Pb
Development Status: None
Deposit Model: Polymetallic veins? (Cox and Singer, 1986; model 22c)

Other Databases

Link to USGS - Alaska:	NB107

Other Regions, Features and Areas containing this locality

References